Lamp-shade.



w. SCHMIDT & P. MULLER.

LAMP SHADE. APPLICATION FILED rB.21. 1913.

Patented June 1, 1915.

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THE NQRRIQ PETE/ ,5 CO, PHOTO-LITHO, WASHINGTON. D. C.

UNETE sra ras Parana orrioa WILLY SCHMIDT, OF FRANKFORT-ON-THE-MAIN, ANDPAUL MULLER, 01E DORTMUND, GERMANY, ASSIGNOR-S TO Gr. SCHANZENBACH & GO.G. M. B. H., OF FRANKFORT-ON THE-MAIN, GERMANY, A FIRM.

LAMP-SHADE.

iaison Application filed. February 21, 1913.

To all whom it may concern:

Be it known that we, WILLY SCHMIDT and PAUL Mi'iLLER, citizens of theGerman Empire, residing, respectively, at Braunheimerlandstrasse 16,Frankfort-on-the-Main, and at Unionstrasse N. 105, Dortmund, in theKingdom of Prussia, Germany, have invented certain new and usefulImprovements in Lamp-Shades; and we do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it ap ertains to make and usethe same.

ur invention relates to a lamp shade and has for its object to provide alamp shade or reflector, which will utilize every ray of light, hide thesource of light from the spectator, and which may be formed to suit theintensity of the light with which it is to be used.

Reflectors which hide from the spectator the source of light, formedafter the fashion of a Venetian blind of triangular or trapezium-shapedprisms are well known, and we are aware that it has been proposed tocover the outside of a glass globe or reflector having a smoothinterior, with prisms adapted to distribute the light in givendirections, and having the prism surfaces so arranged that the surfacefrom which the light last leaves is approximately at right angles to therays from the reflecting surface and we make no claim to suchconstructions. Such reflectors are of such a kind that besides thedirect light reflected, indirect light is sent outward between theprisms because of the mutual reflection, and some of the direct light islost or absorbed. These reflectors have'not been laced much on themarket, because of the difliculty in cleaning, the danger of breakagewhich accompanies the cleaning, and because of the loss of light byabsorption.

The invention will now be described with reference to the accompanyingdrawings, in which- Figure 1 represents the new lamp-covering seen frombelow. Fig. 2, the lower half of a lamp-covering seen from one side.Fig. 3, a cross-section of thelamp:cover1 ng. Fig. 4, the lamp-coveringwlth twlsted r bs.

The lamp shade embodying our lnventlon Specification of Letters Patent.

Patented June 1, 1915.

Serial No. 749,955.

consists of a shade formed with a series of corrugations radiatinglongitudinally from a common center, said center being preferably 1nline with the axis of the source" of llght. Each corrugation or ribconsists of two plane sections arranged at an angle to each other, onesection a, being made of translucent material, such as frosted glass,while the other section b, is made of transparent material, such asclear glass, the corresponding sections of each rib being translucent oropaque.

The translucent sections are arranged at an angle to the light rays ofless than 90,

the size of said angle depending upon the degree of intensity it isdesired to transmit the light to the outside of the globe; thetransparent sections Z), are set at such an angle to the translucentsections that all light reflected back from the translucent sectionswill fall vertically upon the transparent sections and pass directlytherethrough to the outside of the globe. If it is desired to greatlydecrease the intensity of the light the flutes or ribs may be curved ortwisted, thus still further deflecting the angle to the light rays.(Fig. 4).

It will thus be seen that by the use of this shade, no direct rays oflight will pass to the outside of the globe, some of the light raysbeing reflected back and passing through the clear glass, while any rayswhich are not reflected will pass through the translucent glass but willbe scattered thereby before they pass through.

Having thus described our invention what we claim as new and desire tosecure by Letters Patent of the United States is:

1. A lamp shade consisting of a series of ribs, each rib comprising twoconnected sections arranged at an angle to each other, one of saidsections being composed of translucent material and being arranged at anangle to the light rays, and the second section being arranged at suchan angle to the first mentioned section, that all light rays reflectedback from the first section will fall vertically upon the secondsection, substantially as and for the purpose described.

2. A lamp shade consisting of a series of connected ribs radiatinglongitudinally from a common center, each rib consisting of two posed oftranslucent material and the other to 'vertically upon the said secondsection, sub- 10 stantially as and for the purpose described.

In testimony whereof We affix our signatures in the presence of twoWitnesses. V

WILLY S OHMIDT. s] PAUL MULLER. [L. s] Witnesses: s V FRIEDRICH CARLWENVTZEL,

MAX HERMANN HoPPN m connected sections arranged at an angle each other,one of said sections being comof said sections being transparent; thesaid first mentioned section being arranged at an angle to the lightrays and the said second section being arranged at such an angle to thefirst mentioned section that all light rays reflected back from thefirst section Will fall G'opies ofthis patent may be obtained for fivecents each, by addressing the Commissioner .of fatents,

. Washington Difi'. r

